Clear Creek Confluence
Project Overview
Basics
Clear Creek Confluence
Planning/Design
The proposed Clear Creek Confluence project is located at the confluence of Clear Creek and the Clackamas River. The project focuses on increasing physical habitat and complexity at the mouth of Clear Creek and an upstream alcove. 2.7 acres of invasive species removal will promote the recolonization of the property by native species. Replanting the area with native riparian vegetation will encourage understory development as well as provide future sources of large wood.
Large wood placement is proposed along 1,350 linear feet of channel. Placement includes 7 complexity log jams, 12 to 25 pieces each. Structures are proposed along river left, as well an apex jam and outlet jam.
Large wood placement is proposed along 1,350 linear feet of channel. Placement includes 7 complexity log jams, 12 to 25 pieces each. Structures are proposed along river left, as well an apex jam and outlet jam.
2020
2027
2030
4/8/2025
Location
Organizations
| Funder | |
| Lead Implementer | |
| Other Partners | Clackamas County Parks and Recreation, Metro, Oregon Dept of Fish and Wildlife |
Contacts
Isaac Sanders - Clackamas River Basin Council (CRBC) (isaac@clackamasriver.org)
Performance Measures
Expected Performance Measures
| Large Wood Placement | Placement Density: > 25 yrd^3/1000 ft Placement Location: In Channel | 1,350 lf |
| Large Wood Placement | Placement Density: > 25 yrd^3/1000 ft Placement Location: Floodplain | 1,350 lf |
| Riparian / Floodplain Invasive Species Removal Area | Side of stream / river: Both sides of stream | 3 acres |
| Riparian / Floodplain Invasive Species Removal Length | Side of stream / river: Both sides of stream | 1,350 lf |
| Riparian / Floodplain Native Planting Area | Side of stream / river: Two sides | 3 acres |
| Riparian / Floodplain Native Planting Channel Length | Side of stream / river: Both sides of stream Width of planting area (meters from bank): 11 - 20 meters | 1,350 lf |
Reported Performance Measures
Reported Performance Measures are not relevant for Projects in the Planning/Design stage.
Financials
Budget
| Comment: | None provided |
|---|
Reported Expenditures
No Expenditures have been reported for this Project.
| Note: | None provided |
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Focal Species
Focal Species
Increase in spawning area that could be used by chum salmon.
High flow refuge habitat during winter months, especially around the large wood accumulations where coho would prefer to over-winter. Increase in availability of spawning habitat for coho. Juvenile fish use includes summer and winter rearing. Cool water refugia when mainstem Clackamas River temperature is high.
Increase in availability of spawning habitat for fall Chinook.
Deposition of fine sediment around the large wood structures will provide habitat for ammocetes. Increase is spawning habitat used by Pacific lamprey.
Providing cover at various flows throughout life stages.
Providing cover at various flows throughout life stages. Juvenile fish use includes summer and winter rearing. Cool water refugia when mainstem Clackamas River temperature is high.
Project Types
Project Types
The project supports a significant engagement and public education opportunity given the public ownership and high public use levels. County Parkland will facilitate the protection of the project area.
Large wood structures will increase the physical and ecological complexity of the project area and improve year-round habitat; encouraging gravel accumulation, promoting local scour & pool formation, and providing high flow refuge and cover. Large wood accumulations would be focused in geomorphically-appropriate locations and will begin downstream of hydraulic influence of the S. Springwater Road bridge. Log structures are anticipated extend from approximately bankfull width down to low flow. Fencing and targeted public river access points could accompany the project to minimize public impact.
FIP Bienniums
FIP Bienniums
Project Details
Attachments
Overview Map
- Uploaded On
- 10/6/2020
- File Type
- Description
- The overview map provides spatial context for the project area. The Clear Creek confluence is located near River Mile 8.5, and is identified as project area 17 (red numbering).
Project Fact Sheet
- Uploaded On
- 10/6/2020
- File Type
- Description
No attachments
Notes
| 12/05/2017 12:57 PM | Zachary Bergen | Project Prioritization: 1.) Focal species affected: - Two Species 2.) Limiting factors addressed: - Addresses two or more primary and at least one secondary 6e 3. Physical habitat quality: Degraded channel structure and complexity. 6e 4. Physical habitat quality: Degraded floodplain connectivity and function. 6e 1. Physical habitat quality: Degraded riparian areas and large wood recruitment. 3.) Project protection benefits: - Full protection for Clackamas County. - Minimal protection for one private landowner. 4.) Processed-based restoration - Partial restoration- Project partially addresses restoring natural processes. These restoration actions include wetland enhancement, riparian restoration, invasive species removal, and native plantings. 5.) Threats addressed: -Climate change resiliency- Restoration partially or fully addresses climate change resiliency and the project focuses on key habitats that provide resiliency. - Urbanization/development impacts- Restoration actions partially address habitat and watershed processes associated with current and future watershed urbanization. 6.) Project size and scale: - Stream projects (linear scale)- 1/4 to 1/2 mile in length - Floodplain/ riparian area extent (lateral extent)- Project includes some floodplain/riparian activities. 7.) Project readiness, constraints, and risks: -Project readiness- The project's conceptual design does consider other factors such as constructability and how project effectiveness will be demonstrated. -Project constraints and risks- There are few or no feasibility constraints or risks that may limit overall project success. 8.) Outreach, landowner relationship, and socio-economic benefits: -An enthusiastic landowner who is influential in the community and supports tours or outreach activities on their property. |
External Links
No External Links entered.